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#include "OS_context.h"
#include "consts.h"
#include "function_target.h"
ARM_FUNC asm void OS_InitContext(register OSContext *context, register u32 newpc, register u32 newsp)
{
add newpc, newpc, #4
str newpc, [context, #0x40]
str newsp, [context, #0x44]
sub newsp, newsp, #HW_SVC_STACK_SIZE
tst newsp, #4
subne newsp, newsp, #4
str newsp, [context, #0x38]
ands r1, newpc, #1
movne r1, #0x3f
moveq r1, #0x1f
str r1, [context]
mov r1, #0
str r1, [context, #0x4]
str r1, [context, #0x8]
str r1, [context, #0xc]
str r1, [context, #0x10]
str r1, [context, #0x14]
str r1, [context, #0x18]
str r1, [context, #0x1c]
str r1, [context, #0x20]
str r1, [context, #0x24]
str r1, [context, #0x28]
str r1, [context, #0x2c]
str r1, [context, #0x30]
str r1, [context, #0x34]
str r1, [context, #0x3c]
bx lr
}
ARM_FUNC asm BOOL OS_SaveContext(register OSContext *context)
{
add r1, r0, #0
mrs r2, cpsr
str r2, [r1], #0x4
mov r0, #0xd3
msr cpsr_c, r0
str sp, [r1, #0x40]
msr cpsr_c, r2
mov r0, #1
stmia r1, {r0-r14}
add r0, pc, #8
str r0, [r1, #0x3c]
mov r0, #0
bx lr
}
ARM_FUNC asm void OS_LoadContext(register OSContext* context)
{
mrs r1, cpsr
bic r1, r1, #HW_PSR_CPU_MODE_MASK
orr r1, r1, #0xd3
msr cpsr_c, r1
ldr r1, [r0], #0x4
msr spsr_fsxc, r1
ldr sp, [r0, #0x40]
ldr lr, [r0, #0x3c]
ldmia r0, {r0-r14}^
nop
subs pc, lr, #4
}
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